Campylobacter is a bacterium that can cause an illness called campylobacteriosis in humans. With about 200,000 human cases every year, this disease is the most frequently reported food-borne illness in the European Union (EU). However, the actual number of cases is believed to be around 9 million each year. The cost of campylobacteriosis to public health systems and to lost productivity in the EU is estimated by EFSA to be around EUR 2.4 billion a year.